Metamagnetic transition and recovery of isotropic transport phenomena in A-type antiferromagnet Pr0.45Sr0.55MnO3 Original Research Article

Magnetization and magnetoresistance of A-type antiferromagnet Pr0.45Sr0.55MnO3 have been measured by means of pulsed magnetic fields up to 45 T. Below metamagnetic transitions and attendant discontinuous decreases in resistivity were observed. Above the transition fields, the transport anisotropy is reduced compared with that in the antiferromagnetic state. The observed ferromagnetic transition and resistivity change indicate the simultaneous collapse of spin and orbital order by magnetic field.